Joint USAF/NOAA Report of Solar and Geophysical Activity 25 Mar 2007

Product: Report of Solar-Geophysical Activity
Issued: 2007 Mar 25 2200 UTC
Prepared jointly by the U.S. Dept. of Commerce, NOAA,
Space Environment Center and the U.S. Air Force.

Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 084 Issued at 2200Z on 25 Mar 2007

IA. Analysis of Solar Active Regions and Activity from 24/2100Z to 25/2100Z: Solar activity was very low.

IB. Solar Activity Forecast: Solar activity is expected to be very low.

IIA. Geophysical Activity Summary 24/2100Z to 25/2100Z: The geomagnetic field was quiet to active. Solar wind speed is slightly elevated due to a recurrent coronal hole high speed stream.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled with isolated active periods for the next three days due to the recurrent coronal hole high speed stream.

III. Event Probabilities 26 Mar-28 Mar

• Class M 01/01/01
• Class X 01/01/01
• Proton 01/01/01
• PCAF Green

IV. Penticton 10.7 cm Flux

• Observed 25 Mar 074
• Predicted 26 Mar-28 Mar 074/075/075
• 90 Day Mean 25 Mar 078

V. Geomagnetic A Indices

• Observed Afr/Ap 24 Mar 016/021
• Estimated Afr/Ap 25 Mar 010/010
• Predicted Afr/Ap 26 Mar-28 Mar 010/015-012/020-007/010

VI. Geomagnetic Activity Probabilities 26 Mar-28 Mar

A. Middle Latitudes

• Active 25/25/15
• Minor storm 10/15/10
• Major-severe storm 01/01/01

B. High Latitudes

• Active 30/40/25
• Minor storm 20/25/15
• Major-severe storm 10/15/05